extremely tired, WHY!? please help!

Even if you are no longer diabetic, you could still be borderline diabetic and should probably stick tot he way you were eating when you were "oficially" diabetic.

I have type 2 diabetes, and coupled with that came sleep apnea. Do you snore? Wake up wtih dry mouth? Grind your teeth at night/wake up with a sore jaw? Even though I was getting 8-10 hours of sleep a night, having apnea decreased beneficial sleep to 2 hours. And apnea doesn't just happen to overweight individuals... it can also happen to people with large breasts, so keep that in mind ;D

You will want to do some independent research -- you need to know exactly what you want your dr to test you for before you go in to the office. There are six (I think?) different things you can test for for thyroid, not just the one regular test they rely on. Anemia is a pretty straightforward test, but other things might require you to tell your dr what test you'd like done.

Also--could you be sick with something like mono? That could do it as well.

I hope you don't mind, I just had a quick look
at your diary. If each day is complete you are barely
eating 600-800 calories a day with all your exercise.
Some days are less than that as your calorie burn
Is so great. (great job on the calorie burn btw)If your
weight loss has stopped I would try and eat back at
least half your exercise calories.

This could account for being so tired. Your body
is starving.

If this is accurate, you definitely should increase your calories - I'd say double them, at least for a while until your system regulates again. If you're on a dr-managed VLCD, talk to him/her about how you're feeling and let him know it's not working well for you.